Export current pattern to MIDI file. Parses note(), n(), and chord() functions.
AI agents use export_midi to create or update resources in Strudel MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Strudel MCP Server environment.
This tool writes/creates a MIDI file as output, which is a reversible operation (the file can be deleted or overwritten). It does not execute arbitrary code, delete data irreversibly, or move money. While it involves file creation, the generated MIDI file is not critical infrastructure data and can be easily recreated or removed, making it Write rather than Execute or higher severity.
From the tool's definition Tool creates and exports a MIDI file from a music pattern. The description states 'Export current pattern to MIDI file', which involves generating and writing a new file artifact.
Documented attack patterns abuse exactly the kind of access export_midi gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Strudel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for export_midi:
{
"version": "1",
"default": "deny",
"tools": {
"export_midi": {
"limits": [
{
"counter": "export_midi_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}export_midi stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Export current pattern to MIDI file. Parses note(), n(), and chord() functions. It is categorised as a Write tool in the Strudel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Strudel MCP Server MCP server in PolicyLayer and add a rule for export_midi: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Strudel MCP Server. Nothing to install.
export_midi is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the export_midi rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for export_midi. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
export_midi is provided by the Strudel MCP Server MCP server (williamzujkowski/live-coding-music-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Strudel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
10 Strudel MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.